Well, not to clean but I certainly would to polish it. I used a metal polish ( Autosol ) and finished with a jewlery polish. ( I found that toothpaste also makes a good 'finishing' polish). I used a mini drill with polishing head to start and finished by hand. Came up mirror like.
Mothers mag- and aluminum polish...its the shiznit:naughty: . Yeah remove the internals so you can stick your finger inside the tube and hand polish. Remember apply the polish to the rag not the metal, that way the polish wont get in places you dont want too. Good luck, I love polishing my lights